Alas, it pops, and makes other noises. I stupidly made the interrupter part just using a square wave oscillator and a 4066. I think I might replace the noisy and annoying LM386's with something else that might be a bit better... TDA7502A? But also the fact of switching speakers of all different sizes and characteristics (they are all 8 ohms, tho)... this is no hi-fi device!

The 4069 VCO panel was made by a DIY CNC machine not yet working properly, there is a problem with the regulation of the depth of the engravings. So I decided to finish some panels using a hammer and am quite content with the results. Not in the picture is a VCO calibrator (schematic by the Electronic Peasant) which helped a lot.
Anyway, finally my homemade gear can make sounds which approximately sound like music.

We'll need a new 2013 Build Pictures thread now... I might actually get to post something on it this year (New Year's resolution, actually build all the things lying around on breadboards and finish putting things into proper cases etc etc.).

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